gui.c

   1 /*
   2  * Copyright (C) 1998-2011 Andre Noll <maan@systemlinux.org>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file gui.c Curses-based interface for paraslash. */
   8
   9 #include <regex.h>
  10 #include <signal.h>
  11 #include <sys/types.h>
  12 #include <curses.h>
  13
  14 #include "gui.cmdline.h"
  15 #include "para.h"
  16 #include "gui.h"
  17 #include "string.h"
  18 #include "ringbuffer.h"
  19 #include "fd.h"
  20 #include "error.h"
  21 #include "list.h"
  22 #include "sched.h"
  23 #include "signal.h"
  24 #include "version.h"
  25
  26 /** define the array of error lists needed by para_gui */
  27 INIT_GUI_ERRLISTS;
  28 static char *stat_content[NUM_STAT_ITEMS];
  29
  30 #define STANDARD_STATUS_BAR "para_gui " PACKAGE_VERSION " (hit ? for help)"
  31
  32 static int signal_pipe;
  33
  34 static struct win_data {
  35         WINDOW *win;
  36         size_t begx;
  37         size_t begy;
  38         size_t cols;
  39         size_t lines;
  40 } top, bot, sb, in, sep;
  41
  42 #define RINGBUFFER_SIZE 512
  43 struct rb_entry {
  44         char *msg;
  45         size_t len;
  46         int color;
  47 };
  48 static struct ringbuffer *bot_win_rb;
  49 #define NUM_LINES(len) (1 + (len) / bot.cols)
  50
  51 static unsigned scroll_position;
  52
  53 static int cmd_died, curses_active;
  54 static pid_t cmd_pid;
  55
  56 static int command_pipe = -1;
  57 static int stat_pipe = -1;
  58 static struct gui_args_info conf;
  59
  60 enum {GETCH_MODE, COMMAND_MODE, EXTERNAL_MODE};
  61
  62
  63 #define COLOR_STATUSBAR 52
  64 #define COLOR_COMMAND 53
  65 #define COLOR_OUTPUT 54
  66 #define COLOR_MSG 55
  67 #define COLOR_ERRMSG 56
  68 #define COLOR_WELCOME 57
  69 #define COLOR_SEPARATOR 58
  70 #define COLOR_TOP 59
  71 #define COLOR_BOT 60
  72
  73 struct gui_command {
  74         const char *key;
  75         const char *name;
  76         const char *description;
  77         void (*handler)(void);
  78 };
  79
  80 struct stat_item {
  81         char name[MAXLINE];
  82         char prefix[MAXLINE];
  83         char postfix[MAXLINE];
  84         unsigned y;
  85         unsigned x;
  86         unsigned len;
  87         int fg, bg;
  88         int align;
  89         char content[MAXLINE];
  90 };
  91
  92 static struct gui_theme theme;
  93
  94 static int _argc;
  95 static char **_argv;
  96
  97 static void com_help(void);
  98 static void com_reread_conf(void);
  99 static void com_enlarge_top_win(void);
 100 static void com_shrink_top_win(void);
 101 static void com_version(void);
 102 __noreturn static void com_quit(void);
 103 static void com_refresh(void);
 104 static void com_ll_incr(void);
 105 static void com_ll_decr(void);
 106 static void com_prev_theme(void);
 107 static void com_next_theme(void);
 108 static void com_scroll_up(void);
 109 static void com_scroll_down(void);
 110 static void com_page_up(void);
 111 static void com_page_down(void);
 112 static void com_cancel_scrolling(void);
 113 static void com_scroll_top(void);
 114
 115 static struct gui_command command_list[] = {
 116         {
 117                 .key = "?",
 118                 .name = "help",
 119                 .description = "print help",
 120                 .handler = com_help
 121         }, {
 122                 .key = "+",
 123                 .name = "enlarge_win",
 124                 .description = "enlarge the top window",
 125                 .handler = com_enlarge_top_win
 126         }, {
 127                 .key = "-",
 128                 .name = "shrink_win",
 129                 .description = "shrink the top window",
 130                 .handler = com_shrink_top_win
 131         }, {
 132                 .key = "r",
 133                 .name = "reread_conf",
 134                 .description = "reread configuration file",
 135                 .handler = com_reread_conf
 136         }, {
 137                 .key = "q",
 138                 .name = "quit",
 139                 .description = "exit para_gui",
 140                 .handler = com_quit
 141         }, {
 142                 .key = "^L",
 143                 .name = "refresh",
 144                 .description = "redraw the screen",
 145                 .handler = com_refresh
 146         }, {
 147                 .key = ".",
 148                 .name = "next_theme",
 149                 .description = "switch to next theme",
 150                 .handler = com_next_theme
 151         }, {
 152                 .key = ",",
 153                 .name = "prev_theme",
 154                 .description = "switch to previous stream",
 155                 .handler = com_prev_theme
 156         }, {
 157                 .key = ">",
 158                 .name = "ll_incr",
 159                 .description = "increase loglevel (decreases verbosity)",
 160                 .handler = com_ll_incr
 161         }, {
 162                 .key = "<",
 163                 .name = "ll_decr",
 164                 .description = "decrease loglevel (increases verbosity)",
 165                 .handler = com_ll_decr
 166         }, {
 167                 .key = "V",
 168                 .name = "version",
 169                 .description = "show the para_gui version",
 170                 .handler = com_version
 171         }, {
 172                 .key = "<up>",
 173                 .name = "scroll_up",
 174                 .description = "scroll up one line",
 175                 .handler = com_scroll_up
 176         }, {
 177                 .key = "<down>",
 178                 .name = "scroll_down",
 179                 .description = "scroll down one line",
 180                 .handler = com_scroll_down
 181         }, {
 182                 .key = "<ppage>",
 183                 .name = "page_up",
 184                 .description = "scroll up one page",
 185                 .handler = com_page_up
 186         }, {
 187                 .key = "<npage>",
 188                 .name = "page_down",
 189                 .description = "scroll down one page",
 190                 .handler = com_page_down
 191         }, {
 192                 .key = "<home>",
 193                 .name = "scroll_top",
 194                 .description = "scroll to top of buffer",
 195                 .handler = com_scroll_top
 196         }, {
 197                 .key = "<end>",
 198                 .name = "cancel_scroll",
 199                 .description = "deactivate scroll mode",
 200                 .handler = com_cancel_scrolling
 201         }, {
 202                 .handler = NULL
 203         }
 204 };
 205
 206 static int find_cmd_byname(char *name)
 207 {
 208         int i;
 209
 210         for (i = 0; command_list[i].handler; i++)
 211                 if (!strcmp(command_list[i].name, name))
 212                         return i;
 213         return -1;
 214 }
 215
 216 /* taken from mutt */
 217 static char *km_keyname(int c)
 218 {
 219         static char buf[10];
 220
 221         if (c == KEY_UP) {
 222                 sprintf(buf, "<up>");
 223                 return buf;
 224         }
 225         if (c == KEY_DOWN) {
 226                 sprintf(buf, "<down>");
 227                 return buf;
 228         }
 229         if (c == KEY_LEFT) {
 230                 sprintf(buf, "<left>");
 231                 return buf;
 232         }
 233         if (c == KEY_RIGHT) {
 234                 sprintf(buf, "<right>");
 235                 return buf;
 236         }
 237         if (c == KEY_NPAGE) {
 238                 sprintf(buf, "<npage>");
 239                 return buf;
 240         }
 241         if (c == KEY_PPAGE) {
 242                 sprintf(buf, "<ppage>");
 243                 return buf;
 244         }
 245         if (c == KEY_HOME) {
 246                 sprintf(buf, "<home>");
 247                 return buf;
 248         }
 249         if (c == KEY_END) {
 250                 sprintf(buf, "<end>");
 251                 return buf;
 252         }
 253         if (c < 256 && c > -128 && iscntrl((unsigned char) c)) {
 254                 if (c < 0)
 255                         c += 256;
 256                 if (c < 128) {
 257                         buf[0] = '^';
 258                         buf[1] = (c + '@') & 0x7f;
 259                         buf[2] = 0;
 260                 } else
 261                         snprintf(buf, sizeof(buf), "\\%d%d%d", c >> 6,
 262                                 (c >> 3) & 7, c & 7);
 263         } else if (c >= KEY_F0 && c < KEY_F(256))
 264                 sprintf(buf, "<F%d>", c - KEY_F0);
 265         else if (isprint(c))
 266                 snprintf(buf, sizeof(buf), "%c", (unsigned char) c);
 267         else
 268                 snprintf(buf, sizeof(buf), "\\x%hx", (unsigned short) c);
 269         return buf;
 270 }
 271
 272 static char *configfile_exists(void)
 273 {
 274         static char *config_file;
 275         char *tmp;
 276
 277         if (!conf.config_file_given) {
 278                 if (!config_file) {
 279                         char *home = para_homedir();
 280                         config_file = make_message("%s/.paraslash/gui.conf",
 281                                 home);
 282                         free(home);
 283                 }
 284                 tmp = config_file;
 285         } else
 286                 tmp = conf.config_file_arg;
 287         return file_exists(tmp)? tmp: NULL;
 288 }
 289
 290 /*
 291  * print num spaces to curses window
 292  */
 293 static void add_spaces(WINDOW* win, unsigned int num)
 294 {
 295         while (num > 0) {
 296                 num--;
 297                 waddstr(win, " ");
 298         }
 299 }
 300
 301 /*
 302  * print aligned string to curses window. This function always prints
 303  * exactly len chars.
 304  */
 305 static int align_str(WINDOW* win, char *str, unsigned int len,
 306                 unsigned int align)
 307 {
 308         int i, num; /* of spaces */
 309
 310         if (!win || !str)
 311                 return -1;
 312         num = len - strlen(str);
 313         if (num < 0) {
 314                 str[len] = '\0';
 315                 num = 0;
 316         }
 317         /* replace control characters by spaces */
 318         for (i = 0; i < len && str[i]; i++) {
 319                 if (str[i] == '\n' || str[i] == '\r' || str[i] == '\f')
 320                         str[i] = ' ';
 321         }
 322         if (align == LEFT) {
 323                 waddstr(win, str);
 324                 add_spaces(win, num);
 325         } else if (align == RIGHT) {
 326                 add_spaces(win, num);
 327                 waddstr(win, str);
 328         } else {
 329                 add_spaces(win, num / 2);
 330                 waddstr(win, str[0]? str: "");
 331                 add_spaces(win, num - num / 2);
 332         }
 333         return 1;
 334 }
 335
 336 __printf_2_3 static void print_in_bar(int color, const char *fmt,...)
 337 {
 338         char *msg;
 339
 340         if (!curses_active)
 341                 return;
 342         wattron(in.win, COLOR_PAIR(color));
 343         PARA_VSPRINTF(fmt, msg);
 344         wmove(in.win, 0, 0);
 345         align_str(in.win, msg, sb.cols, LEFT);
 346         free(msg);
 347         wrefresh(in.win);
 348 }
 349
 350 /*
 351  * update the status bar
 352  */
 353 static void print_status_bar(void)
 354 {
 355         char *tmp;
 356
 357         if (!curses_active)
 358                 return;
 359         tmp = para_strdup(STANDARD_STATUS_BAR);
 360         wmove(sb.win, 0, 0);
 361         align_str(sb.win, tmp, sb.cols, CENTER);
 362         free(tmp);
 363         wrefresh(sb.win);
 364 }
 365
 366 /*
 367  * get the number of the oldest rbe that is (partially) visible. On return,
 368  * lines contains the sum of the number of lines of all visable entries. If the
 369  * first one is only partially visible, lines is greater than bot.lines.
 370  */
 371 static int first_visible_rbe(unsigned *lines)
 372 {
 373         int i;
 374         *lines = 0;
 375         for (i = scroll_position; i < RINGBUFFER_SIZE; i++) {
 376                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
 377                 int rbe_lines;
 378                 if (!rbe)
 379                         return i - 1;
 380 //              fprintf(stderr, "found: %s\n", rbe->msg);
 381                 rbe_lines = NUM_LINES(rbe->len);
 382                 if (rbe_lines > bot.lines)
 383                         return -1;
 384                 *lines += rbe_lines;
 385                 if (*lines >= bot.lines)
 386                         return i;
 387         }
 388         return RINGBUFFER_SIZE - 1;
 389 }
 390
 391 static int draw_top_rbe(unsigned *lines)
 392 {
 393         unsigned len;
 394         int offset, fvr = first_visible_rbe(lines);
 395         struct rb_entry *rbe;
 396
 397         if (fvr < 0)
 398                 return -1;
 399         wmove(bot.win, 0, 0);
 400         rbe = ringbuffer_get(bot_win_rb, fvr);
 401         if (!rbe)
 402                 return -1;
 403         len = strlen(rbe->msg);
 404         if (*lines > bot.lines) {
 405                 /* first rbe is only partially visible */
 406                 offset = (*lines - bot.lines) * bot.cols;
 407                 assert(offset <= len);
 408         } else
 409                 offset = 0;
 410         wattron(bot.win, COLOR_PAIR(rbe->color));
 411         waddstr(bot.win, rbe->msg + offset);
 412         *lines = NUM_LINES(len - offset);
 413         return fvr;
 414 }
 415
 416 static void redraw_bot_win(void)
 417 {
 418         unsigned lines;
 419         int i;
 420
 421         wmove(bot.win, 0, 0);
 422         wclear(bot.win);
 423         i = draw_top_rbe(&lines);
 424         if (i <= 0)
 425                 goto out;
 426         while (i > 0 && lines < bot.lines) {
 427                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
 428                 if (!rbe) {
 429                         lines++;
 430                         waddstr(bot.win, "\n");
 431                         continue;
 432                 }
 433                 lines += NUM_LINES(rbe->len);
 434                 wattron(bot.win, COLOR_PAIR(rbe->color));
 435                 waddstr(bot.win, "\n");
 436                 waddstr(bot.win, rbe->msg);
 437         }
 438 out:
 439         wrefresh(bot.win);
 440 }
 441
 442 static void rb_add_entry(int color, char *msg)
 443 {
 444         struct rb_entry *old, *new = para_malloc(sizeof(struct rb_entry));
 445         int x, y;
 446         new->color = color;
 447         new->len = strlen(msg);
 448         new->msg = msg;
 449         old = ringbuffer_add(bot_win_rb, new);
 450 //      fprintf(stderr, "added: %s\n", new->msg);
 451         if (old) {
 452                 free(old->msg);
 453                 free(old);
 454         }
 455         if (scroll_position) {
 456                 /* discard current scrolling, like xterm does */
 457                 scroll_position = 0;
 458                 redraw_bot_win();
 459                 return;
 460         }
 461         wattron(bot.win, COLOR_PAIR(color));
 462         getyx(bot.win, y, x);
 463         if (y || x)
 464                 waddstr(bot.win, "\n");
 465         waddstr(bot.win, msg);
 466 }
 467
 468 /*
 469  * print formated output to bot win and refresh
 470  */
 471 __printf_2_3 static void outputf(int color, const char* fmt,...)
 472 {
 473         char *msg;
 474
 475         if (!curses_active)
 476                 return;
 477         PARA_VSPRINTF(fmt, msg);
 478         rb_add_entry(color, msg);
 479         wrefresh(bot.win);
 480 }
 481
 482 static int add_output_line(char *line, __a_unused void *data)
 483 {
 484         if (!curses_active)
 485                 return 1;
 486         rb_add_entry(COLOR_OUTPUT, para_strdup(line));
 487         return 1;
 488 }
 489
 490 static int loglevel;
 491
 492 __printf_2_3 void para_log(int ll, const char *fmt,...)
 493 {
 494         int color;
 495         char *msg;
 496
 497         if (ll < loglevel || !curses_active)
 498                 return;
 499         switch (ll) {
 500                 case LL_DEBUG:
 501                 case LL_INFO:
 502                 case LL_NOTICE:
 503                         color = COLOR_MSG;
 504                         break;
 505                 default:
 506                         color = COLOR_ERRMSG;
 507         }
 508         PARA_VSPRINTF(fmt, msg);
 509         chop(msg);
 510         rb_add_entry(color, msg);
 511         wrefresh(bot.win);
 512 }
 513
 514 static void setup_signal_handling(void)
 515 {
 516         signal_pipe = para_signal_init();
 517         para_install_sighandler(SIGINT);
 518         para_install_sighandler(SIGTERM);
 519         para_install_sighandler(SIGCHLD);
 520         para_install_sighandler(SIGWINCH);
 521         para_install_sighandler(SIGUSR1);
 522         para_sigaction(SIGHUP, SIG_IGN);
 523 }
 524
 525 __noreturn static void do_exit(int ret)
 526 {
 527         para_sigaction(SIGTERM, SIG_IGN);
 528         kill(0, SIGTERM);
 529         exit(ret);
 530 }
 531
 532 static void shutdown_curses(void)
 533 {
 534         if (!curses_active)
 535                 return;
 536         def_prog_mode();
 537         curses_active = 0;
 538         endwin();
 539 }
 540
 541 __noreturn static void finish(int ret)
 542 {
 543         shutdown_curses();
 544         do_exit(ret);
 545 }
 546
 547 /*
 548  * exit curses and print given message to stdout/stderr
 549  */
 550 __noreturn __printf_2_3 static void msg_n_exit(int ret, const char* fmt, ...)
 551 {
 552         va_list argp;
 553         FILE *outfd = ret? stderr: stdout;
 554
 555         shutdown_curses();
 556         va_start(argp, fmt);
 557         vfprintf(outfd, fmt, argp);
 558         va_end(argp);
 559         do_exit(ret);
 560 }
 561
 562 static void print_welcome(void)
 563 {
 564         if (loglevel > LL_NOTICE)
 565                 return;
 566         outputf(COLOR_WELCOME, "Welcome to para_gui " PACKAGE_VERSION
 567                 " \"" CODENAME "\". Theme: %s", theme.name);
 568         wclrtoeol(bot.win);
 569 }
 570
 571 /*
 572  * init all windows
 573  */
 574 static void init_wins(int top_lines)
 575 {
 576         int i;
 577
 578         top.lines = top_lines;
 579         top.cols = COLS;
 580         top.begy = 0;
 581         top.begx = 0;
 582
 583         bot.lines = LINES - top.lines - 3;
 584         bot.cols = COLS;
 585         bot.begy = top.lines + 1;
 586         bot.begx = 0;
 587
 588         sb.lines = 1;
 589         sb.cols = COLS;
 590         sb.begy = LINES - 2;
 591         sb.begx = 0;
 592
 593         in.lines = 1;
 594         in.cols = COLS;
 595         in.begy = LINES - 1;
 596         in.begx = 0;
 597
 598         sep.lines = 1;
 599         sep.cols = COLS;
 600         sep.begy = top.lines;
 601         sep.begx = 0;
 602
 603         assume_default_colors(theme.default_fg, theme.default_bg);
 604         if (top.win) {
 605                 mvwin(top.win, top.begy, top.begx);
 606                 wresize(top.win, top.lines, top.cols);
 607
 608                 mvwin(sb.win, sb.begy, sb.begx);
 609                 wresize(sb.win, sb.lines, sb.cols);
 610
 611                 mvwin(sep.win, sep.begy, sep.begx);
 612                 wresize(sep.win, sep.lines, sep.cols);
 613
 614                 mvwin(bot.win, bot.begy, bot.begx);
 615                 wresize(bot.win, bot.lines, bot.cols);
 616
 617                 mvwin(in.win, in.begy, in.begx);
 618                 wresize(in.win, in.lines, in.cols);
 619         } else {
 620                 sep.win = newwin(sep.lines, sep.cols, sep.begy, sep.begx);
 621                 top.win = newwin(top.lines, top.cols, top.begy, top.begx);
 622                 bot.win = newwin(bot.lines, bot.cols, bot.begy, bot.begx);
 623                 sb.win = newwin(sb.lines, sb.cols, sb.begy, sb.begx);
 624                 in.win = newwin(in.lines, in.cols, in.begy, in.begx);
 625                 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
 626                         msg_n_exit(1, "Error: Cannot create curses windows\n");
 627                 wclear(bot.win);
 628                 wclear(sb.win);
 629                 wclear(in.win);
 630                 scrollok(bot.win, 1);
 631                 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
 632                 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
 633                 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
 634                 wattron(top.win, COLOR_PAIR(COLOR_TOP));
 635                 nodelay(top.win, 1);
 636                 nodelay(bot.win, 1);
 637                 nodelay(sb.win, 1);
 638                 nodelay(in.win, 0);
 639
 640                 keypad(top.win, 1);
 641                 keypad(bot.win, 1);
 642                 keypad(sb.win, 1);
 643                 keypad(in.win, 1);
 644                 print_status_bar();
 645         }
 646         wmove(sep.win, 0, 0);
 647         for (i = 1; i <= COLS; i++)
 648                 waddstr(sep.win, theme.sep_str);
 649         wclear(top.win);
 650         //wclear(bot.win);
 651         wnoutrefresh(top.win);
 652         wnoutrefresh(bot.win);
 653         //wnoutrefresh(sb.win);
 654         print_status_bar();
 655         wnoutrefresh(in.win);
 656         wnoutrefresh(sep.win);
 657         doupdate();
 658 }
 659
 660 /*
 661  * Print stat item #i to curses window
 662  */
 663 static void print_stat_item(int i)
 664 {
 665         char *tmp;
 666         struct stat_item_data d = theme.data[i];
 667         char *c = stat_content[i];
 668
 669         if (!curses_active || !d.len || !c)
 670                 return;
 671         tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
 672         wmove(top.win, d.y * top.lines / 100, d.x * COLS / 100);
 673         wrefresh(top.win);
 674         wattron(top.win, COLOR_PAIR(i + 1));
 675         align_str(top.win, tmp, d.len * COLS / 100, d.align);
 676         free(tmp);
 677         wrefresh(top.win);
 678 }
 679
 680 static int update_item(int item_num, char *buf)
 681 {
 682         char **c = stat_content + item_num;
 683
 684         free(*c);
 685         if (buf && buf[0])
 686                 goto dup;
 687         switch (item_num) {
 688         case SI_ARTIST:
 689                 *c = para_strdup("(artist tag not set)");
 690                 goto print;
 691         case SI_TITLE:
 692                 *c = para_strdup("(title tag not set)");
 693                 goto print;
 694         case SI_YEAR:
 695                 *c = para_strdup("????");
 696                 goto print;
 697         case SI_ALBUM:
 698                 *c = para_strdup("(album tag not set)");
 699                 goto print;
 700         case SI_COMMENT:
 701                 *c = para_strdup("(comment tag not set)");
 702                 goto print;
 703         }
 704 dup:
 705         *c = para_strdup(buf);
 706 print:
 707         print_stat_item(item_num);
 708         return 1;
 709 }
 710
 711 static int read_stat_pipe(fd_set *rfds)
 712 {
 713         static char *buf;
 714         static int bufsize, loaded;
 715         int ret, ret2;
 716         size_t sz;
 717
 718         if (stat_pipe < 0)
 719                 return 0;
 720         if (loaded >= bufsize) {
 721                 if (bufsize > 1000 * 1000) {
 722                         loaded = 0;
 723                         return 0;
 724                 }
 725                 bufsize += bufsize + 1000;
 726                 buf = para_realloc(buf, bufsize);
 727         }
 728         assert(loaded < bufsize);
 729         ret = read_nonblock(stat_pipe, buf + loaded, bufsize - loaded,
 730                 rfds, &sz);
 731         loaded += sz;
 732         ret2 = for_each_stat_item(buf, loaded, update_item);
 733         if (ret < 0 || ret2 < 0) {
 734                 loaded = 0;
 735                 return ret2 < 0? ret2 : ret;
 736         }
 737         sz = ret2; /* what is left */
 738         if (sz > 0 && sz < loaded)
 739                 memmove(buf, buf + loaded - sz, sz);
 740         loaded = sz;
 741         return 1;
 742 }
 743
 744 static void print_all_items(void)
 745 {
 746         int i;
 747
 748         if (!curses_active)
 749                 return;
 750         FOR_EACH_STATUS_ITEM(i)
 751                 print_stat_item(i);
 752 }
 753
 754 static void clear_all_items(void)
 755 {
 756         int i;
 757
 758         FOR_EACH_STATUS_ITEM(i) {
 759                 free(stat_content[i]);
 760                 stat_content[i] = para_strdup("");
 761         }
 762 }
 763
 764 static void init_pair_or_die(short pair, short f, short b)
 765 {
 766         if (init_pair(pair, f, b) == ERR)
 767                 msg_n_exit(EXIT_FAILURE, "fatal: init_pair() failed\n");
 768 }
 769
 770 static void init_colors_or_die(void)
 771 {
 772         int i;
 773
 774         if (!has_colors())
 775                 msg_n_exit(EXIT_FAILURE, "fatal: No color term\n");
 776         if (start_color() == ERR)
 777                 msg_n_exit(EXIT_FAILURE, "fatal: failed to start colors\n");
 778         FOR_EACH_STATUS_ITEM(i)
 779                 if (theme.data[i].len)
 780                         init_pair_or_die(i + 1, theme.data[i].fg,
 781                                 theme.data[i].bg);
 782         init_pair_or_die(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
 783         init_pair_or_die(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
 784         init_pair_or_die(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
 785         init_pair_or_die(COLOR_MSG, theme.msg_fg, theme.msg_bg);
 786         init_pair_or_die(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
 787         init_pair_or_die(COLOR_WELCOME, theme.welcome_fg, theme.welcome_bg);
 788         init_pair_or_die(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
 789         init_pair_or_die(COLOR_TOP, theme.default_fg, theme.default_bg);
 790         init_pair_or_die(COLOR_BOT, theme.default_fg, theme.default_bg);
 791 }
 792
 793 /* (Re-)initialize the curses library. */
 794 static void init_curses(void)
 795 {
 796         curses_active = 1;
 797         if (top.win && refresh() == ERR) /* refesh is really needed */
 798                 msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
 799         if (LINES < theme.lines_min || COLS < theme.cols_min)
 800                 msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
 801                         " (need at least %dx%d)\n", COLS, LINES,
 802                         theme.cols_min, theme.lines_min);
 803         curs_set(0); /* make cursor invisible, ignore errors */
 804         nonl(); /* do not NL->CR/NL on output, always returns OK */
 805         /* don't echo input */
 806         if (noecho() == ERR)
 807                 msg_n_exit(EXIT_FAILURE, "fatal: noecho() failed\n");
 808         /* take input chars one at a time, no wait for \n */
 809         if (cbreak() == ERR)
 810                 msg_n_exit(EXIT_FAILURE, "fatal: cbreak() failed\n");
 811         init_colors_or_die();
 812         clear(); /* ignore non-fatal errors */
 813         init_wins(theme.top_lines_default);
 814         print_all_items();
 815         // noecho(); /* don't echo input */
 816 }
 817
 818 static void check_sigchld(void)
 819 {
 820         int ret;
 821         pid_t pid;
 822 reap_next_child:
 823         ret = para_reap_child(&pid);
 824         if (ret <= 0)
 825                 return;
 826         if (pid == cmd_pid) {
 827                 cmd_pid = 0;
 828                 cmd_died = 1;
 829         }
 830         goto reap_next_child;
 831 }
 832
 833 /*
 834  * This sucker modifies its first argument. *handler and *arg are
 835  * pointers to 0-terminated strings (inside line). Crap.
 836  */
 837 static int split_key_map(char *line, char **handler, char **arg)
 838 {
 839         if (!(*handler = strchr(line + 1, ':')))
 840                 goto err_out;
 841         **handler = '\0';
 842         (*handler)++;
 843         if (!(*arg = strchr(*handler, ':')))
 844                 goto err_out;
 845         **arg = '\0';
 846         (*arg)++;
 847         return 1;
 848 err_out:
 849         return 0;
 850 }
 851
 852 static int check_key_map_args(void)
 853 {
 854         char *s;
 855         int i, ret = -1;
 856         char *tmp = NULL, *handler, *arg;
 857
 858         for (i = 0; i < conf.key_map_given; ++i) {
 859                 s = conf.key_map_arg[i];
 860                 if (!(*s))
 861                         goto err_out;
 862                 free(tmp);
 863                 tmp = para_strdup(s);
 864                 if (!split_key_map(tmp, &handler, &arg))
 865                         goto err_out;
 866                 if (strlen(handler) != 1)
 867                         goto err_out;
 868                 if (*handler != 'x'
 869                         && *handler != 'd'
 870                         && *handler != 'i'
 871                         && *handler != 'p')
 872                         goto err_out;
 873                 if (*handler != 'i')
 874                         continue;
 875                 if (find_cmd_byname(arg) < 0)
 876                         goto err_out;
 877         }
 878         ret = 0;
 879 err_out:
 880         free(tmp);
 881         return ret;
 882 }
 883
 884 /*
 885  * React to various signal-related events
 886  */
 887 static void handle_signal(int sig)
 888 {
 889         switch (sig) {
 890         case SIGTERM:
 891                 msg_n_exit(EXIT_FAILURE,
 892                         "only the good die young (caught SIGTERM))\n");
 893                 return;
 894         case SIGWINCH:
 895                 if (curses_active) {
 896                         shutdown_curses();
 897                         init_curses();
 898                         redraw_bot_win();
 899                 }
 900                 return;
 901         case SIGINT:
 902                 PARA_WARNING_LOG("caught SIGINT, reset");
 903                 /* Nothing to do. SIGINT killed our child which gets noticed
 904                  * by do_select and resets everything.
 905                  */
 906                 return;
 907         case SIGUSR1:
 908                 PARA_NOTICE_LOG("got SIGUSR1, rereading configuration");
 909                 com_reread_conf();
 910                 return;
 911         case SIGCHLD:
 912                 check_sigchld();
 913                 return;
 914         }
 915 }
 916
 917 static int open_stat_pipe(void)
 918 {
 919         static int init = 1;
 920         int ret, fds[3] = {0, 1, 0};
 921         pid_t pid;
 922
 923         if (init)
 924                 init = 0;
 925         else
 926                 /*
 927                  * Sleep a bit to avoid a busy loop. As the call to sleep() may
 928                  * be interrupted by SIGCHLD, we simply wait until the call
 929                  * succeeds.
 930                  */
 931                 while (sleep(2))
 932                         ; /* nothing */
 933         ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
 934         if (ret < 0)
 935                 return ret;
 936         ret = mark_fd_nonblocking(fds[1]);
 937         if (ret >= 0)
 938                 return fds[1];
 939         close(fds[1]);
 940         return ret;
 941 }
 942
 943 /*
 944  * This is the core select loop. Besides the (internal) signal
 945  * pipe, the following other fds are checked according to the mode:
 946  *
 947  * GETCH_MODE: check stdin, return when key is pressed
 948  *
 949  * COMMAND_MODE: check command_pipe and stdin. Return when a screen full
 950  * of output has been read or when other end has closed command pipe or
 951  * when any key is pressed.
 952  *
 953  * EXTERNAL_MODE: Check only signal pipe. Used when an external command
 954  * is running. During that time curses is disabled.  Returns when
 955  * cmd_pid == 0.
 956  */
 957 static int do_select(int mode)
 958 {
 959         fd_set rfds;
 960         int ret;
 961         int max_fileno;
 962         char command_buf[4096] = "";
 963         int cbo = 0; /* command buf offset */
 964         struct timeval tv;
 965 repeat:
 966         tv.tv_sec = conf.timeout_arg  / 1000;
 967         tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
 968 //      ret = refresh_status();
 969         FD_ZERO(&rfds);
 970         max_fileno = 0;
 971         if (stat_pipe < 0)
 972                 stat_pipe = open_stat_pipe();
 973         if (stat_pipe >= 0)
 974                 para_fd_set(stat_pipe, &rfds, &max_fileno);
 975         /* signal pipe */
 976         para_fd_set(signal_pipe, &rfds, &max_fileno);
 977         /* command pipe only for COMMAND_MODE */
 978         if (command_pipe >= 0 && mode == COMMAND_MODE)
 979                 para_fd_set(command_pipe, &rfds, &max_fileno);
 980         ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
 981         if (ret <= 0)
 982                 goto check_return; /* skip fd checks */
 983         /* signals */
 984         ret = para_next_signal(&rfds);
 985         if (ret > 0)
 986                 handle_signal(ret);
 987         /* read command pipe if ready */
 988         if (command_pipe >= 0 && mode == COMMAND_MODE) {
 989                 size_t sz;
 990                 ret = read_nonblock(command_pipe, command_buf + cbo,
 991                         sizeof(command_buf) - 1 - cbo, &rfds, &sz);
 992                 cbo += sz;
 993                 sz = cbo;
 994                 cbo = for_each_line(command_buf, cbo, &add_output_line, NULL);
 995                 if (sz != cbo)
 996                         wrefresh(bot.win);
 997                 if (ret < 0) {
 998                         PARA_NOTICE_LOG("closing command pipe: %s",
 999                                 para_strerror(-ret));
1000                         close(command_pipe);
1001                         command_pipe = -1;
1002                         return 0;
1003                 }
1004         }
1005         ret = read_stat_pipe(&rfds);
1006         if (ret < 0) {
1007                 PARA_NOTICE_LOG("closing stat pipe: %s\n", para_strerror(-ret));
1008                 close(stat_pipe);
1009                 stat_pipe = -1;
1010                 clear_all_items();
1011                 free(stat_content[SI_BASENAME]);
1012                 stat_content[SI_BASENAME] =
1013                         para_strdup("stat command terminated!?");
1014                 print_all_items();
1015         }
1016 check_return:
1017         switch (mode) {
1018         case COMMAND_MODE:
1019                 ret = wgetch(top.win);
1020                 if (ret != ERR && ret != KEY_RESIZE) {
1021                         if (command_pipe) {
1022                                 close(command_pipe);
1023                                 command_pipe = -1;
1024                         }
1025                         if (cmd_pid)
1026                                 kill(cmd_pid, SIGTERM);
1027                         return -1;
1028                 }
1029                 break;
1030         case GETCH_MODE:
1031                 ret = wgetch(top.win);
1032                 if (ret != ERR && ret != KEY_RESIZE)
1033                         return ret;
1034                 break;
1035         case EXTERNAL_MODE:
1036                 if (cmd_died) {
1037                         cmd_died = 0;
1038                         return 0;
1039                 }
1040         }
1041         goto repeat;
1042 }
1043
1044 /*
1045  * read from command pipe and print data to bot window
1046  */
1047 static int send_output(void)
1048 {
1049         int ret;
1050
1051         if (command_pipe < 0)
1052                 return 0;
1053         ret = mark_fd_nonblocking(command_pipe);
1054         if (ret < 0) {
1055                 close(command_pipe);
1056                 return ret;
1057         }
1058         if (do_select(COMMAND_MODE) >= 0)
1059                 PARA_INFO_LOG("command complete");
1060         else
1061                 PARA_NOTICE_LOG("command aborted");
1062         print_in_bar(COLOR_MSG, " ");
1063         return 1;
1064 }
1065
1066 static int client_cmd_cmdline(char *cmd)
1067 {
1068         int ret, fds[3] = {0, 1, 0};
1069         char *c = make_message(BINDIR "/para_client -- %s", cmd);
1070
1071         outputf(COLOR_COMMAND, "%s", c);
1072         print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
1073         ret = para_exec_cmdline_pid(&cmd_pid, c, fds);
1074         free(c);
1075         if (ret < 0)
1076                 return -1;
1077         command_pipe = fds[1];
1078         return send_output();
1079 }
1080
1081 /*
1082  * exec command and print output to bot win
1083  */
1084 static int display_cmd(char *cmd)
1085 {
1086         int fds[3] = {0, 1, 0};
1087
1088         print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1089         outputf(COLOR_COMMAND, "%s", cmd);
1090         if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1091                 return -1;
1092         command_pipe = fds[1];
1093         return send_output();
1094 }
1095
1096 /*
1097  * shutdown curses and stat pipe before executing external commands
1098  */
1099 static int external_cmd(char *cmd)
1100 {
1101         int fds[3] = {-1, -1, -1};
1102
1103         if (cmd_pid)
1104                 return -1;
1105         shutdown_curses();
1106         para_exec_cmdline_pid(&cmd_pid, cmd, fds);
1107         cmd_died = 0;
1108         do_select(EXTERNAL_MODE);
1109         init_curses();
1110         return 0;
1111 }
1112
1113 static void print_scroll_msg(void)
1114 {
1115         unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1116         int first_rbe = first_visible_rbe(&lines_total);
1117         print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1118                 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1119 }
1120
1121 static void com_scroll_top(void)
1122 {
1123         int i = RINGBUFFER_SIZE - 1;
1124         unsigned lines = 0;
1125
1126         while (i > 0 && !ringbuffer_get(bot_win_rb, i))
1127                 i--;
1128         /* i is oldest entry */
1129         for (; lines < bot.lines && i >= 0; i--) {
1130                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1131                 if (!rbe)
1132                         break;
1133                 lines += NUM_LINES(strlen(rbe->msg));
1134         }
1135         i++;
1136         if (lines > 0 && scroll_position != i) {
1137                 scroll_position = i;
1138                 redraw_bot_win();
1139                 print_scroll_msg();
1140                 return;
1141         }
1142         print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1143 }
1144
1145 static void com_cancel_scrolling(void)
1146 {
1147
1148         if (scroll_position == 0) {
1149                 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1150                 return;
1151         }
1152         scroll_position = 0;
1153         redraw_bot_win();
1154 }
1155
1156 static void com_page_down(void)
1157 {
1158         unsigned lines = 0;
1159         int i = scroll_position;
1160         while (lines < bot.lines && --i > 0) {
1161                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1162                 if (!rbe)
1163                         break;
1164                 lines += NUM_LINES(strlen(rbe->msg));
1165         }
1166         if (lines) {
1167                 scroll_position = i;
1168                 redraw_bot_win();
1169                 print_scroll_msg();
1170                 return;
1171         }
1172         print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1173 }
1174
1175 static void com_page_up(void)
1176 {
1177         unsigned lines;
1178         int fvr = first_visible_rbe(&lines);
1179
1180         if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1181                 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1182                 return;
1183         }
1184         scroll_position = fvr + 1;
1185         for (; scroll_position > 0; scroll_position--) {
1186                 first_visible_rbe(&lines);
1187                 if (lines == bot.lines)
1188                         break;
1189         }
1190         redraw_bot_win();
1191         print_scroll_msg();
1192 }
1193
1194 static void com_scroll_down(void)
1195 {
1196         struct rb_entry *rbe;
1197         int rbe_lines;
1198
1199         if (!scroll_position) {
1200                 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1201                 return;
1202         }
1203         scroll_position--;
1204         rbe = ringbuffer_get(bot_win_rb, scroll_position);
1205         rbe_lines = NUM_LINES(rbe->len);
1206         wscrl(bot.win, rbe_lines);
1207         wmove(bot.win, bot.lines - rbe_lines, 0);
1208         wattron(bot.win, COLOR_PAIR(rbe->color));
1209         waddstr(bot.win, rbe->msg);
1210         wrefresh(bot.win);
1211         print_scroll_msg();
1212 }
1213
1214 static void com_scroll_up(void)
1215 {
1216         struct rb_entry *rbe = NULL;
1217         unsigned lines;
1218         int i, first_rbe, num_scroll;
1219
1220         /* the entry that is going to vanish */
1221         rbe = ringbuffer_get(bot_win_rb, scroll_position);
1222         if (!rbe)
1223                 goto err_out;
1224         num_scroll = NUM_LINES(rbe->len);
1225         first_rbe = first_visible_rbe(&lines);
1226         if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1227                 goto err_out;
1228         scroll_position++;
1229         wscrl(bot.win, -num_scroll);
1230         i = draw_top_rbe(&lines);
1231         if (i < 0)
1232                 goto err_out;
1233         while (i > 0 && lines < num_scroll) {
1234                 int rbe_lines;
1235                 rbe = ringbuffer_get(bot_win_rb, --i);
1236                 if (!rbe)
1237                         break;
1238                 rbe_lines = NUM_LINES(rbe->len);
1239                 lines += rbe_lines;
1240 //              fprintf(stderr, "msg: %s\n", rbe->msg);
1241                 wattron(bot.win, COLOR_PAIR(rbe->color));
1242                 waddstr(bot.win, "\n");
1243                 waddstr(bot.win, rbe->msg);
1244                 if (!i)
1245                         break;
1246                 i--;
1247         }
1248         wrefresh(bot.win);
1249         print_scroll_msg();
1250         return;
1251 err_out:
1252         print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1253 }
1254
1255 static void com_ll_decr(void)
1256 {
1257         if (loglevel <= LL_DEBUG) {
1258                 print_in_bar(COLOR_ERRMSG,
1259                         "loglevel already at maximal verbosity\n");
1260                 return;
1261         }
1262         loglevel--;
1263         print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1264 }
1265
1266 static void com_ll_incr(void)
1267 {
1268         if (loglevel >= LL_EMERG) {
1269                 print_in_bar(COLOR_ERRMSG,
1270                         "loglevel already at minimal verbosity\n");
1271                 return;
1272         }
1273         loglevel++;
1274         print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1275 }
1276
1277 /*
1278  * reread configuration, terminate on errors
1279  */
1280 static void com_reread_conf(void)
1281 {
1282         char *cf =configfile_exists();
1283         struct gui_cmdline_parser_params params = {
1284                 .override = 1,
1285                 .initialize = 1,
1286                 .check_required = 0,
1287                 .check_ambiguity = 0,
1288                 .print_errors = 0,
1289         };
1290
1291         if (!cf) {
1292                 PARA_WARNING_LOG("there is no configuration to read");
1293                 return;
1294         }
1295         PARA_INFO_LOG("rereading command line options and config file");
1296         gui_cmdline_parser_ext(_argc, _argv, &conf, &params);
1297         if (gui_cmdline_parser_config_file(cf, &conf, &params) != 0) {
1298                 PARA_EMERG_LOG("errors in config file");
1299                 finish(EXIT_FAILURE);
1300         }
1301         PARA_NOTICE_LOG("config file reloaded");
1302         if (check_key_map_args() < 0)
1303                 finish(EXIT_FAILURE);
1304 }
1305
1306 static void com_help(void)
1307 {
1308         int i;
1309
1310         for (i = 0; i < conf.key_map_given; ++i) {
1311                 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1312                 const char *handler_text = "???", *desc = NULL;
1313
1314                 if (!split_key_map(tmp, &handler, &arg)) {
1315                         free(tmp);
1316                         return;
1317                 }
1318                 switch (*handler) {
1319                         case 'i':
1320                                 handler_text = "internal";
1321                                 desc = command_list[find_cmd_byname(arg)].description;
1322                                 break;
1323                         case 'x': handler_text = "external"; break;
1324                         case 'd': handler_text = "display "; break;
1325                         case 'p': handler_text = "para    "; break;
1326                 }
1327                 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1328                         strlen(arg) < 8? "\t" : "",
1329                         desc? desc : "");
1330                 free(tmp);
1331         }
1332         for (i = 0; command_list[i].handler; i++) {
1333                 struct gui_command gc = command_list[i];
1334
1335                 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1336                         strlen(gc.name) < 8? "\t" : "",
1337                         gc.description);
1338         }
1339         print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1340                 "for more info");
1341 }
1342
1343 static void com_shrink_top_win(void)
1344 {
1345         if (top.lines <= theme.top_lines_min) {
1346                 PARA_WARNING_LOG("can not decrease top window");
1347                 return;
1348         }
1349         init_wins(top.lines - 1);
1350         wclear(top.win);
1351         print_all_items();
1352         print_in_bar(COLOR_MSG, "%s", "decreased top window");
1353 }
1354
1355 static void com_enlarge_top_win(void)
1356 {
1357         if (bot.lines < 3) {
1358                 PARA_WARNING_LOG("can not increase top window");
1359                 return;
1360         }
1361         init_wins(top.lines + 1);
1362         wclear(top.win);
1363         print_all_items();
1364         print_in_bar(COLOR_MSG, "increased top window");
1365 }
1366
1367 static void com_version(void)
1368 {
1369         print_in_bar(COLOR_MSG, "para_gui " PACKAGE_VERSION " \""
1370                 CODENAME "\"");
1371 }
1372
1373 __noreturn static void com_quit(void)
1374 {
1375         finish(0);
1376 }
1377
1378 static void com_refresh(void)
1379 {
1380         shutdown_curses();
1381         init_curses();
1382 }
1383
1384 static void change_theme(int next)
1385 {
1386         if (next)
1387                 next_theme(&theme);
1388         else
1389                 prev_theme(&theme);
1390         /* This seems to be needed twice, why? */
1391         com_refresh();
1392         com_refresh();
1393         PARA_NOTICE_LOG("new theme: %s", theme.name);
1394 }
1395
1396 static void com_next_theme(void)
1397 {
1398         change_theme(1);
1399 }
1400
1401 static void com_prev_theme(void)
1402 {
1403         change_theme(0);
1404 }
1405
1406
1407 static void handle_command(int c)
1408 {
1409         int i;
1410
1411         /* first check user's key bindings */
1412         for (i = 0; i < conf.key_map_given; ++i) {
1413                 char *tmp, *handler, *arg;
1414
1415                 tmp = para_strdup(conf.key_map_arg[i]);
1416                 if (!split_key_map(tmp, &handler, &arg)) {
1417                         free(tmp);
1418                         return;
1419                 }
1420                 if (strcmp(tmp, km_keyname(c))) {
1421                         free(tmp);
1422                         continue;
1423                 }
1424                 if (*handler == 'd')
1425                         display_cmd(arg);
1426                 else if (*handler == 'x')
1427                         external_cmd(arg);
1428                 else if (*handler == 'p')
1429                         client_cmd_cmdline(arg);
1430                 else if (*handler == 'i') {
1431                         int num = find_cmd_byname(arg);
1432                         if (num >= 0)
1433                                 command_list[num].handler();
1434                 }
1435                 free(tmp);
1436                 return;
1437         }
1438         /* not found, check internal key bindings */
1439         for (i = 0; command_list[i].handler; i++) {
1440                 if (!strcmp(km_keyname(c), command_list[i].key)) {
1441                         command_list[i].handler();
1442                         return;
1443                 }
1444         }
1445         print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1446                 km_keyname(c));
1447 }
1448
1449 int main(int argc, char *argv[])
1450 {
1451         int ret;
1452         char *cf;
1453
1454         _argc = argc;
1455         _argv = argv;
1456
1457         if (gui_cmdline_parser(argc, argv, &conf) != 0)
1458                 exit(EXIT_FAILURE);
1459         HANDLE_VERSION_FLAG("gui", conf);
1460         cf = configfile_exists();
1461         if (!cf && conf.config_file_given) {
1462                 fprintf(stderr, "can not read config file %s\n",
1463                         conf.config_file_arg);
1464                 exit(EXIT_FAILURE);
1465         }
1466         if (cf) {
1467                 struct gui_cmdline_parser_params params = {
1468                         .override = 0,
1469                         .initialize = 0,
1470                         .check_required = 0,
1471                         .check_ambiguity = 0,
1472                         .print_errors = 1,
1473                 };
1474                 if (gui_cmdline_parser_config_file(cf, &conf, &params) != 0)
1475                         exit(EXIT_FAILURE);
1476         }
1477         loglevel = get_loglevel_by_name(conf.loglevel_arg);
1478         if (check_key_map_args() < 0) {
1479                 fprintf(stderr, "invalid key map\n");
1480                 exit(EXIT_FAILURE);
1481         }
1482         init_theme_or_die(conf.theme_arg, &theme);
1483         top.lines = theme.top_lines_default;
1484         setup_signal_handling();
1485         bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1486         initscr(); /* needed only once, always successful */
1487         init_curses();
1488         print_welcome();
1489         for (;;) {
1490                 print_status_bar();
1491                 ret = do_select(GETCH_MODE);
1492                 if (!ret)
1493                         continue;
1494                 print_in_bar(COLOR_MSG, " ");
1495                 handle_command(ret);
1496         }
1497 }